<!--父级页面：控制除登陆页面以外的所有页面共有的头部与左侧菜单栏-->
<template>
<!--弹性布局display：flex
    效果：所有子元素横置，且父元素父元素不会失高，根据子元素横置后的实际高度自动填充高度-->
<div style="display: flex;height: 100vh">
<!-- 左侧菜单栏 -->
  <div :style="{width:is_collapse?'64px':'208px'}">
    <el-menu router
             unique-opened
    background-color="#3c82f5"
    text-color="#fff"
    active-text-color="#ff0"
    style="width: 100%;height: 100%"
    :collapse="is_collapse"
    :collapse-transition="false"
    @select="selectMenu">
<!--   左侧菜单栏顶部条   -->
      <el-row style="padding-top:10px">
        <el-col :span="2"></el-col>
        <el-col :span="7" style="padding-left:7px ">
          <el-avatar src="/imgs/admin/logo.png" style="width: 35px;height: 35px"></el-avatar>
        </el-col>
        <el-col :span="is_collapse?0:13">
          <span style="color: #fff;font-weight: bold;position: relative;top:8px;left: 6px">智慧车辆</span>
        </el-col>
      </el-row>
      <el-sub-menu index="1">
        <template #title>
          <el-icon style="    font-size: 21px"><User/></el-icon><span>用户管理</span>
        </template>
        <el-menu-item index="/user">用户列表</el-menu-item>

      </el-sub-menu>
      <el-sub-menu index="/2">
        <template #title>
          <el-icon style="font-size: 21px"><Van/></el-icon><span>车辆管理</span>

        </template>
        <el-menu-item index="/vehicle">车辆列表</el-menu-item>
      </el-sub-menu>
      <el-sub-menu index="3">
        <template #title>
          <el-icon style="font-size: 21px"><Van/></el-icon><span>调度管理</span>
        </template>
        <el-menu-item index="/application">申请列表</el-menu-item>
        <el-menu-item index="/audit">调度审核</el-menu-item>
        <el-menu-item index="/distribute">车辆分配</el-menu-item>
      </el-sub-menu>
      <el-sub-menu index="4">
        <template #title>
          <el-icon style="font-size: 21px"><Van/></el-icon><span>电子围栏</span>

        </template>
        <el-menu-item index="/geofence">围栏管理</el-menu-item>

      </el-sub-menu>
      <el-sub-menu index="5">
        <template #title>
          <el-icon style="font-size: 21px"><Van/></el-icon><span>数据字典</span>

        </template>
        <el-menu-item index="/dict">字典管理</el-menu-item>

      </el-sub-menu>

    </el-menu>
  </div>
<!-- 右侧主体 -->
  <div :style="{width:is_collapse?'calc(100% - 64px)':'calc(100% - 208px)'}">
    <el-header style="height: 90px;background-color: #fff;padding-top: 22px;" >
<!--   折叠图标与用户名选项   -->
      <el-row>
        <el-col :span="18">
          <el-icon style="font-size: 30px" @click="change_collapse"><Expand/></el-icon>
        </el-col>
        <el-col :span="6" style="position: relative;">
          <el-dropdown style="position: absolute;right: 20px;top: 5px" trigger="click">
            <span style="font-size:20px;font-weight: bold">
              {{ user.username }}
              <el-icon style="vertical-align: middle"><arrow-down/></el-icon>
            </span>
            <template #dropdown>
              <el-dropdown-menu>
                <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
              </el-dropdown-menu>
            </template>
          </el-dropdown>
        </el-col>
      </el-row>
<!--   面包屑导航   -->
      <el-breadcrumb separator=">" style="position: relative">
        <el-breadcrumb-item>首页</el-breadcrumb-item>
        <el-breadcrumb-item v-for="item in breadcrumb">{{item}}</el-breadcrumb-item>
      </el-breadcrumb>
    </el-header>
    <el-main style="height: calc(100% - 90px);padding:0;overflow-y: auto">
        <router-view/>
    </el-main>

  </div>
</div>
</template>

<script setup>
import {ref} from "vue";


const user = ref(getUser())

//定义变量控制左侧菜单栏是否折叠
const is_collapse = ref(false)
//处理菜单栏是否折叠
const change_collapse = ()=>{
  is_collapse.value=!is_collapse.value;
}
const logout =()=>{
  if(confirm('您确认退出吗')){
    //退出时清空数据
    localStorage.removeItem('user');
    localStorage.removeItem('breadcrumb');
    //跳转到登录页
    //router.push('/login')
    window.location.href = '/login';
    //清空取出来的用户数据
    //user.value='';
  }
}
//定义维护菜单项index与面包屑导航的关系
let map = {
  '/user':['用户管理','用户列表'],
  '/vehicle':['车辆管理','车辆列表'],
  '/application':['调度管理','申请列表'],
  '/audit':['调度管理','调度审核'],
  '/distribute':['调度管理','车辆分配'],
  '/geofence':['电子围栏','围栏管理'],

  '/dict':['数据字典','字典管理']
}
//定义一个变量用来保存当前面包屑的导航值
const breadcrumb = ref(JSON.parse(localStorage.getItem('breadcrumb'))||['用户管理','用户列表'])


const selectMenu = (index)=>{

  console.log(index)
  breadcrumb.value = map[index];//java中：map.get(index)
  localStorage.setItem('breadcrumb',JSON.stringify(breadcrumb.value))


}


</script>
